6404944 has 80 divisors (see below), whose sum is σ = 15748992. Its totient is φ = 2456064.

The previous prime is 6404929. The next prime is 6404987. The reversal of 6404944 is 4494046.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77127 + ... + 77209.

Almost surely, 2^6404944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6404944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7874496).

6404944 is an abundant number, since it is smaller than the sum of its proper divisors (9344048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6404944 is a wasteful number, since it uses less digits than its factorization.

6404944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6404944 is about 2530.7990832937. The cubic root of 6404944 is about 185.7113494041.

The spelling of 6404944 in words is "six million, four hundred four thousand, nine hundred forty-four".